i used creatine for a while, stopped and thought I wouldn't notice any difference but did. It certainly helps me get the most form my routine, whether it's placebo I'm not sure but I don't think so.
For instance i find it helps to enable me to finish all my excesses on the day. Say my push day, I do bench then skull crushers then military press. Without creatine I seemed to be a lot less likely to complete all exercises, ie I'd bench 5x5 then skulls and by the time I was going on to military I'd be wasted and struggle from the start.
Now I find I have a lot more stamina as far as moving on to different excesses on the same day goes.
I just use My Protein for stuff online, good service. I have the Creatine CEE tablets though as it tastes shocking.
I also bought some glutamine as I was feeling run down all the time during recovery, not too sure on that though as I've been layed off for a couple of weeks after a dodgy back.